Conference table base



FIG. 1 is an isometric view of the conference table base showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is the front elevation thereof;

FIG. 4 is the side elevation; opposite side is mirror image; and,

FIG. 5 is a cross-sectional view taken along line 5—5 in FIG. 3.

The broken lines are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a conference table base, as shown and described. 